It's not a thing where I am from, exactly, but certain theoretical physicists had ideas and thoughts about how interdimensional travel could work, even though the theories haven't been proven. It's a lot of mathematical calculations and theorems.

[ He sounds very much like this is a thrilling thing. ]

So I can't tell you how it works exactly. I can tell you the result is that we get on this train and at the end of a specified period we end up in a completely different, yet insular world. There doesn't appear to be any other way off that place.